The City of Saint John is investigating after elevated levels of carbon monoxide at the Charles Gorman Arena over the weekend made some people sick.

A user called the arena on Sunday afternoon, saying he and several teammates who were in the arena on Saturday night had experienced flu-like symptoms, according to a statement issued by the City on Wednesday afternoon.

The arena attendant used a hand-held device to test the air quality and detected carbon monoxide levels of up to 67 parts per million (ppm), the statement says.

Health Canada's residential indoor air quality guidelines call for a "short-term limit" of 25 ppm, based on a one-hour average, while the long-term exposure limit is 10 ppm, based on a 24-hour average, according to the website.